Comparison: add section on memory leaks with React (#2678)
Comparison: add section on memory leaks with React (#2678)

* docs(guides): Comparison - add section on jQuery and memory leaks

* docs(guides): Comparison - remove link to V in MVC

As React removed it from all the documentation, because they felt it was not conveying the right message.

* docs(guides): Comparison Page - update example to use bootstrap, reword first paragraph

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